19754420

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{149}}^1\times {\mathrm{947}}^1$

素因数の和:1112

約数の個数: 48

約数和(自身を含む): 47779200

約数和(自身を除く): 28024780

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 149, 298, 596, 745, 947, 1043, 1490, 1894, 2086, 2980, 3788, 4172, 4735, 5215, 6629, 9470, 10430, 13258, 18940, 20860, 26516, 33145, 66290, 132580, 141103, 282206, 564412, 705515, 987721, 1411030, 1975442, 2822060, 3950884, 4938605, 9877210, 19754420]

約数ペア:

[(1, 19754420), (2, 9877210), (4, 4938605), (5, 3950884), (7, 2822060), (10, 1975442), (14, 1411030), (20, 987721), (28, 705515), (35, 564412), (70, 282206), (140, 141103), (149, 132580), (298, 66290), (596, 33145), (745, 26516), (947, 20860), (1043, 18940), (1490, 13258), (1894, 10430), (2086, 9470), (2980, 6629), (3788, 5215), (4172, 4735)]